Brake-shoe.



T. McGARRIGAL.

BRAKE SHOE.

APPLICATION FILED JULY 19, 1911.

' Patented Dec. 19, 1911,

THOMAS McGARRIG-AL, OF PADUGAI-I, KENTUCKY.

BRAKE-SHOE.

Specification of Letters Patent.

Application filed July 19, 1911.

Patented Dec. 19, 1911. Serial No. 639,361.

To all whom it may concern:

Be it known that I, THOMAS MCGARRIGAL, citizen of the United States, residing at Paducah, in the county of McCracken and State of Kentucky have invented certain new and useful Improvements in Brake- Shoes, of which the following is a specification.

This invention relates to brake shoes and supporting heads therefor, and has for its object to provide a shoe of especial design adapted to fit securely against a head of similar design and which may be easily and quickly detached from the head for substitution or other purposes.

lVith this object in view the brake includes a body having at its rear side eXserted portions which are spaced one from the other. The shoe is provided at its upper and lower ends and at its rear side with rearwardly disposed shoulders. Upon the uppermost exserted portion the shoe is provided with a cylindrical part. The head which supports the shoe is provided with end portions adapted to fit snugly against the shoulders of the shoe, and the said head is also provided with lugs which are adapted to receive between them one of the said exserted portions of the shoe. The said head is also provided with a cylindrical opening in which the said cylindrical portion of the shoe is adapted to be slipped longitudinally. Securing pins having spreadable points are adapted to be inserted through the side portion of the head and into openings provided in the said cylindrical portion of the shoe. The head is adapted to be supported upon a beam and from a hanger in a manner as will be hereinafter explained.

F or a full understanding of the invention reference is to be had to the following description and accompanying drawing in which:

Figure 1 is a side elevation of the shoe and head; Fig. 2 is a top plan view of the same; Fig. 3 is a perspective view of the head; and Fig. 4 is a perspective view of the shoe.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawing by the same reference characters.

The shoe 1 has a wheel bearing surface, indicated at 2, which is of the usual disposition. At the rear side of the shoe 1 and at the upper and lower edges thereof rearwardly disposed flanges 3 are provided. Exserted portions 4 are located at the back of the shoe 1 and are spaced one from the other. The uppermost exserted portion 1 is provided at its rear side with a rearwardly disposed cylindrical portion 5 which in turn is provided with apertures 6 which open at their ends at the opposite sides of the said portion 5 and which increase in transverse sectional area from their upper to their lower ends. The head 7 is provided with end portions 8 which are adapted to fit snugly against the opposite end portions of the shoe 1 and against the inner faces of the shoulders 33. The said head 7 is provided with lugs 9 which receive between them the lowermost exserted portion 4 of the shoe 1. The head 7 is also provided wit-h an opening 10 which is circular in transverse section and which is adapted to snugly receive the cylindrical port-ion 5 of the shoe 1 when the said port-ion is slipped longitudinally therein. The head 7 is provided with apertures 11 the lower ends of which enter the opening 10 and the said apertures 11 are adapted to register wit-h the apertures 6 provided in the cylindrical portion 5 of the shoe 1. The head 7 is provided at its rear side with a recess 12 adapted to receive the end portion of a supporting beam 13. The said head is also provided with an eye 14: which may receive the end of a link (not shown) whereby the head may be supported in proper position at the end of the beam 13. The head 7 in side elevation is of general concavo-convex configuration and at its ends and in its concaved side is provided with channels 15 which are located between the vertical sides of the said head. By providing these channels the weight of the head is reduced and at the same time there is ample bearing surface provided between the head and the shoe, and the head is thereby given a certain amount of resiliency which will permit its portions to spring slightly when the force is applied to bring the shoe in hard frictional contact with the periphery of a wheel. It will be observed that when the shoe is in position upon the head 7 the lower rear portion of the shoe is spaced from the lower portion of the head and consequently the slight flexible movement above indicated may take place. When the shoe is slipped in position upon the head as above indicated, cotter pins 16 are passed down through the apertures 11 and (3 and the lower ends of the said pins are permitted to spread in the lower portions of the apertures 6, whereby the shoe 1 will be held in position upon the head 7. The apertures 6 extend to the ends of the cylindrical portion 5 of the shoe 1 and consequently an implement may be inserted in the said apertures 6 and passed under the lower ends of the pins 16 when it is desired to remove the said pins in order to detach the shoe 1 from the head 7.

Having thus described the invention what is claimed as new is:

1. In combination with a head having spaced lugs and an opening which is approximately circular in transverse section, a shoe having at its rear side and at its ends rearwardly disposed shoulders against which the ends of the head are adapted to bear, said shoe having upon its rear side spaced exserted portions, the said lugs adapted to receive one of the said portions between them, said shoe having upon its uppermost exserted portion an approximately cylindrical portion which is adapted to he snugly re ceived within the opening provided in the head.

2. In comloination' with a head provided with spaced lugs and having its upper and lower end portions channeled, said head also having an opening which is approximately circular in transverse section, a shoe having at its rear side and at its upper and lower ends shoulders against which the ends of the head are adapted to bear, said shoe having upon its rear side spaced eXserted portions the lower one of which is adapted to be snugly received between the said lugs, the uppermost exserted portion having an approximately cylindrical portion adapted to be snugly received in the opening pro vided in the head.

3. A device of the character indicated comprising a head having spaced lugs and provided with an opening which is approximately circular in transverse section, a shoe having at its ends shoulders against which the ends of the head are adapted to bear, said shoehaving at its rear side exserted portions one of which adapted to be received between the lugs of the head, the other exserted portion having a cylindrical portion adapted to fit snugly in the opening in the head, said cylindrical portion having at its ends transversely disposed apertures which increase in transverse sectional area from one side of the said cylindrical portion to the other, and pins having spreadahle points inserted through a side of the head and having their ends located in the aper' tures of the said cylindrical. portion.

In testimony whereof, I atiix my signature in presence of two witnesses.

THOMAS MOGARRIGAL.

lVitnesses S. T. VILLIAMS, S. H. INs'rnAD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

